4:30 PMYahoo (YHOO+10.1%), which took off on a report Microsoft (MSFT) is weighing a bid, drops 3.6% AH as Kara Swisher, who broke the first reports of buyout interest, says her sources tell her "Microsoft execs have taken pains to make it clear" they won't be bidding for Yahoo. She adds that much of the current M&A speculation is "being pumped up by bankers."